Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a46324207a9ecbf…

MALICIOUS

PDF

78.0 KB Created: 2021-09-09 16:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d819c2206668c2fc9a3aa439ed5bda7 SHA-1: 3710d4147de453ab4941d87ecb98559e05a0ffd6 SHA-256: 8a46324207a9ecbf627f850af8c2ed0a5154868202e587b3f2d9a648b3a9304d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports this, implying a lure to trick users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://parkergeneralcontractors.net/userfiles/file/sexerusukegonurikutiv.pdf In PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/pokofeseniviwapow.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/56417814779.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/12733355659.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/baxajedemos.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/37975799818.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/57611167252.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/34805076998.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/gigejizugesajamajif.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///23359830354.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/titepovugibopukoriromajoj.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///11429914391.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/sidufevosezaku.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/25371401750.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/43924098425.pdfIn PDF document text
    • http://faradbox.pl/files/file/69712999280.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/161344d547d6e3---witemusate.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/masop.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/58400508498.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/nevadowojusowonakoxana.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/91068465176.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/foxelurajuxisare.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613754e2a040a---sovoruzes.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/bomamogupimopume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=jersey+torrent+magnetPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10F 16360 bytes
SHA-256: e48636e3d3a26f85384299ddf59405c1e58490fa653e413abc952a5d1c97e3b2
font_01_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 10416 bytes
SHA-256: 472c2b6702cd86327060dc541e163706422614d0907903a1e5052d386cd30533
font_02_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1